Air or moisture proof package



'J. S. STOKES.

AIR 0R. MOISTURE PROOF PACKAGE.

APPLICATION FILED FEB. 25, I918.

Patented June 15, 1920.

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UNITED STATES PATENT OFFICE."

JoHN STOGDELL STOKES, or MOORESTOWN, NEW JERSEY, nssrcNon rosroxns'a. SMITH COMPANY, or PHILADELPHIA, PENNSYLVANIA, A CORPORATION or i 4 I 'i a a.

' PENNSYLVAK IA.

run on No'rs'rnan moor PACKAGE.

To all whom it may concern:

Be it known that I, JOHN S'rocnnLL STOKES, a citizen of the United States, re-' siding at Moorestown, lington and State of New Jersey, haveinvented new and useful Improvements in Air or Moisture Proof Packages, of which the following is a specification.- v

This invention relates to air or moistureproof packages, and more especially to packages of the sealed wrapped type wherein the wrapper is adhesively secured to exterior faces of the commodity container.

.The envelopment of the commodity container by a suitable wrapping blank with the blank folded about the container and adhesively secured to exterior faces of the container, isone of the developments in packaging operations of I recent years, the arrangement being such as to perblank' to be applied by automatic or semi-automatic machines. This ability to complete the packaging by mechanical manipulation not only provides for comparatively high capacity output, but in addition general enables the package wrapping to be uniform so as to provide packages of uniform ap pearance. Packages of this type are generally air proof and, to someextent, moistureproof, through the fact that the adhesive by which the blank is secured to the container is generally applied throughout the surface extent of the securing face of the blank,

thus providing a coatingwhich tends to prevent access of moisture to the container and its contents.

The present invention is designed more particularly to meet these conditions, this result being had by generally protecting this coating against the effect of these conditions, by interposing between the coated face of the wrapper blank and theexterior of the package a layer which is substantially air and moisture-proof in character,

in the county of Burprotection of the conmade to operateln connection with a blank a suitable material for such layer being, for instance,

Specification of Letters Patent. 1 Patented, {Th ne 15 1920-- I I Application filed rebruar as, 1918. Serial No. 219,008. I i

parafiin. And'sincethe exterior face of the package 1s generally printed in the form of a a label, this layer is preferably interposed between the opposite faces of the blank.

commercially, certain difficulties must be overcome.- For instance, the cost of productlon ofthe package should not be materially increased, it being understood that so In order that this idea may be employed 7 packages of the sealed, Wrapped type generally are well established in the trade and marketed in large 'quantities, being practically standard as to package and price; hence, a package which would materially affect the cost and selling. price of the package is a disadvantage commercially. Another factor is the practical necessity of provldmg the wrapping operations by automatrc machines'in order that the wrapping cost may be reduced to the minimum and the desired uniformity be obtained; In this latter .connection, it will be understood that one of the factors of successful operation under high capacity conditions is the character of the blank, it being more or less esreadily folded, in' order that the folding operations may be'properly performed in the machme. In addition, it is desirable, both by, reason of the package formation and of the machine operation, that the wrapper be comparatively light in weight.

Wrapper applying ofth's type-under automatic operation pract cally necessitates that the adhesive coating be applied-to the sential that it be flexible and pliable and wrapper blank in advance ofwrapper application, and therefore the face on whichv the adhesive coating is placed must be of a character which will carry such adhesive coating and which will permit of affixing to the container by the action of the adhesive coating. While the blanks now generally employed provide this result by reason of the character of the blank, a radical change in condition is present where the attemptis having a layer ofrthe type referred to. 1

package after the adhesive "coating had driedthis difliculty is not present, since the adhesive has become set and is therefore unaffected by the presence of the parreadily damaged. Nor would these disad;

ter= operation, this-paraffin layer must be provided in. advance of the paraflin sheet. is well known, the-"repellent action of the paraflin tendingto reduce the aflin; such operation, however, is practically useless commercially both by reason of cost of operation and low capacityoperations, in i addition to which the paraflin'coatlng would be external of the package and therefore vantages be materially eliminated by; adding to the dipped packagean additional wrapping element so as to protect the parafiin coating, since thiswe simply increase the general cost of; on and affect the capacity. Hence, i essential. that the wrapper ,bl pleted as to the paraffin laye'r, p '-,to':wrapper application, and since the adhesive is necessarily more or less fluid'during the latthe adhesive coating. I,

The difliculty of applyingadhe'sive to a absorption of"the'adh'esive by the'f s heet, and

this fact provides one of the difficulties,

which must; be overcome before successful production of packages of thisgtype having this protecting feature, can beprovided under commercial conditions.

In the present invention I meet these difficulties by the use of acompo'site-sheet for the blank, this sheet hem of ply formatio'n -generally two plies o paper-the plies being united by the paraffin layer, the latter being comparatively thin. The paper plies are preferably of comparatively thin stock and are preferably of calendered paper- .tissue paper or the commercial product known as glacine paper may be employed.

' The paraffin is located between the plies and presence of this paraffin and is therefore unites the' confronting faces thereof, and may be appliedeither to the face of one ply or to the face ;.of both lies, the uniting of the plies being b suita lemeanssuch as heat and pressure, t e layer being somewhat B the use of the is. kept from in the nature of a film. calendered paper, the para permeating'through the ply and hence the outer face of the ply is not affected by the capable of receiving the adhesive coating and providingthe securing action between I the blank and the container. The opposite outer face of the sheet is similarly free from the effects of the paraffin and is therefore capable of being'printed upon if desired, or where it is desired to provide an additional wrapping, this face is capable of roviding the proper securing action of the a hesive by which the additional wrapper is secured in position.

, To these and other ends, therefore, the nature of which will be readily understood as the invention is hereinafter disclosed, said invention consists in the improved construction and combination of parts hereinfi p'licatibn of ventional 1y at Z1.

after fully described, illustrated in the/ abcompanyingdrawings, and more particularly pointed out in theappended clai v hich acteristic formation of the blank. a

Fig. 4 is a similar view showing-the use of anadditional wrap er. The blank shown in igl. 1 is more or less illustrative, it bein understood that the particular configuratio'ii of the blank maybe varied as desired and to meet the particular character of wrapping operation to be "hlad; For instance, the blanks may be of .t e t es shown in U. S. Patents NdsT- 1,219, 88, 1,249,498, 1,249,54s,-- 1,249,571, 1,249,607, or 1,253,436, these various types of blank contours being employedin con' nectionwith wrapping operations of different kinds, all, however, being designed to provide a sealed wrappedv package and be applied b automatic, or semi-automatic machines. he blank 'is indicated at B, the container being indicated at C, the latter.

being assumed to contain the commodity and as ready for wrapping operation, "these patents indicating the general way in which the blanks; are applied, wrapping'of the container being designed to produce a tight or sealed wrapped package, viz: a package 1 wherein the wrapper is adhesively secured to exterior faces of the container as distinguished from packa es in which the wrapper is-loose-free rom adhesive connection to the container walls. As disclosed in these several patents, a face'of the blankis coated with the adhesive, this coating extending substantially throughout the surface of such face. The coating is indicated con- As shown in Fig. 3, the blank is formed from a compositesheet, this sheet, in the in stance illustrated, being of two-ply formation, each ply being of calendered paper and comparatively thin. The two plies, indi- 3 cated at 10 and 11, bing united by the interposed layer or film of paraffinindicated at 12the paraffin being applied in suitable manner, the plies being united as by theapplication of heat and pressure to the for- 1 mation.

The sheet thus formed, although composite in character, is comparatively thin andlight in weight, and has the characteristics of pliability and flexibility so as to 1 permit of ready folding during the wrap- Y ping operation. In addition, the outer faces hence are not subjeeted to strains which,

v the wrapping application.

of the sheet are'l not affected by the presence of the paraffin layer or film, so that such faces are capable of receiving anadhe'sive coating or be printed upon as desired. If de'sired the plies may be formed of glacine paper, or of highly-calendered paper. In either instance,- the parafiinlayer or film does not sufliciently penetrate the plies as to affect the outer faces of such plies, the uniting action being sufficient for this par-. ticular use, due to the fact that in prepar-.

ing the wrapping operation, both plles partake of the various folds employed and would tend to separate the plies. AlldlSlliQQ the outer faces of the plies are not affected by the presence of the paraflin layer or film,

these faces can be given the treatment neces-. marry in preparingthe wrapper blank for In Fig. 4: I have shown the applicationof an additionalwrapper to this com osite emg indicated at 14,-theouter. wrapper bein adhesive'ly connected to the wrapped pa c age.

sheet wrapper, this; outer wrapper Since the wrapper of the fpackage is, for. reasons above pointed out, o

this additional wrapper can be readily secured in position. This additional wrapper is not essential, being of advantage mainly where the package is intended for exporting to tropical countries, inwhich case the additional adhesive coating which envelops 'I'the paraflin layer or film of the composite sheet, tends to decreaselthe possibility of.

affecting the air and moisture-proof charmachines especially adapted for. this purpose, thus providing no material increase in the cost of packaging over that heretofore involved, while at the same time the high capacity operation may be had. In addition, the blank is of a type which provides the protective feature of'the parafiin layer or film without affecting the outer surfaces of the sheet in such, manner as would prevent the use of the sheet as a blank in such machines.

While I have herein shown and described several embodiments of the invention, and

."WhatIclaimisL 1. An air. .or moisture-proof package of' V a type adapted to permit of proper adhesive connection,

ways'in which it may be carriedinto effect,

it will be understood vthat variations and -mod1ficat1ons therein may be found desir-,

able or. necessary in meeting the exi encies of commercial use or application, an Ideslre to' be understoodif'as reserving the ri ht to make any and all such 'changesor mo lfications as may be found desirable. or essen- -tial, insofar as the same may fall within the spirit and scope of the invention as expressed in accompanying claims.

While I have herein referred to the\material for uniting theplies as of a paraflin nature, it will be understood, of course, that this is more or less illustrative, it being of the plies and whichis adapted to act as a repellent against or moisture and having adhesiveproperties.

thesealed wrapped type'comprlsing a commodity container, and: a wrapper enveloping '.'the containerv and adh'esively secured of pliable readily-foldable paper of ply for mation, said plies being united by a parafiinlayer, said ply formation including a'ply havin an outer face impermeable to the per constitutesa complete seal for the package excluding air and-moisture.

2. An air or moisture proof package of the sealed wrapped ty e comprising acommodity container, an a wrapper enveloping the container and adhesively secured to exterior faces thereof, said wrapper being of pliable readily-foldable paper of ply formation, said plies being united b a paraflin layer, theply formation inc riding a ply of calendered paper to provide an exposed face of'th'e blank capable of carrying an adhesive coating, whereby wrapping may be provided'with an adhesively coated blank, the construction being such that the wrapper constitutes a complete seal'for the package excluding air and moisture.

to exterior facesthereof, said wraper being ifs" 3. An air or moisture-proof package of I modity container, and a wrapper enveloping the container and adhesively secured to of pliable readily-foldable paper .of ply formation, said plies being unltedby a parafiin layer and having faces impermeable to the paraffin andcapable of carryingfar. adhesive coating, whereby wrapping may be provided with an adhesi velycoated blank, the construction being such that the wrapperconstitutes a complete seal for the package excluding air and moisture.

the sealed wrapped typecomprising a com- 80 obvious'thatthis layer may be of any ma: 1 terial which can be applied to the material para 11 and capable of carrying an adhesive coating, whereby wrapping may be" provided with an adhesively coated blank, the construction being such that the wrap- 120 i exterior faces thereof, said wrapper being .modity container,' an

4. air or moisture-proof package of the sealed wrapped ty e comprising a coma Wrapper enveloping' the container andadhesively secured to exterior-faces thereof, said Wrapper being of pliable readily-foldable paper of ply formation, said plies being united by a parafiin layer and having faces impermeable to the paraffinand capable of carrying an adhesive coating, and an outer Wrappgr Elan 10 ie b an adhesively connected to the app the construction being such that the Wrap: per constitutes a complete seal for the package excluding air and moisture.

Intestimonywhereof I have hereunto set 15 y h i V JOHNSTOGDELL STOKES. 

